/Engine/Source/Runtime/Slate/Public/Widgets/SWeakWidget.h
Weak widgets encapsulate a piece of content without owning it. e.g. A tooltip is owned by the hovered widget but displayed by a floating window. That window cannot own the tooltip and must therefore use anSWeakWidget.
class SWeakWidget : public [SWidget](API\Runtime\SlateCore\Widgets\SWidget)